84=-2u

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Solution for 84=-2u equation:


Simplifying
84 = -2u

Solving
84 = -2u

Solving for variable 'u'.

Move all terms containing u to the left, all other terms to the right.

Add '2u' to each side of the equation.
84 + 2u = -2u + 2u

Combine like terms: -2u + 2u = 0
84 + 2u = 0

Add '-84' to each side of the equation.
84 + -84 + 2u = 0 + -84

Combine like terms: 84 + -84 = 0
0 + 2u = 0 + -84
2u = 0 + -84

Combine like terms: 0 + -84 = -84
2u = -84

Divide each side by '2'.
u = -42

Simplifying
u = -42

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